Summary

Case submitted by: HMVT
Country: The Netherlands
Built-up site?: Yes
Soil type: Mainly sand
Follow-up required?: Monitoring
Treated contamination: Chlorinated Volatile Organic Compounds (CVOC)
Medium contamination: soil/pure product and groundwater
Dimension contamination: 40000 m3
Remediation goal: Stable end situatie
Load removal
Remediation goal achieved?: Remediation in progress
Initial and final concentration or load removal:
Source CVOC initial concentration: 200000 ug/l; final concentration: 3000 ug/l
total load: 900 kg; total final load: <10 kg Contamination 2:plume CVOC
initial concentration: 11000 ug/l final concentration: <50 ug/l total initial load: 36 kg; total final load: <1 kg
Active remediation phase: 01/06/2008 until 01/09/2008
Passive remediation phase: Expected realization period: 01-09-2008 until 01-09-2018

Case detailed information

General information
Project name: Ede: CVOC ** Case submitted by: HMVT Contact: Ted Vendrig Address: Postbus 174 Telephone number: +31 (0)318-624 624 Email-address: info@hmvt.nl
Location
Country: The Netherlands City/region/county: Ede / Gelderland (future) use of location: Industrial Built-up location during the active remediation phase?: Yes
Technique
Explanation technique: Direct injection of slow release substrate (more info: http://www.ennasanering.nl) in combination with extraction to enhance transport. Also other remediation techniques applied?: No After care needed?: Monitoring Rationale for the chosen technique: The location is being used for a factory, shopping center and infrastructure. Construction of the system was limited. Technology chosen: - Direct injection slow release substrate (see also www.ennasanering.nl) - Enhanced trasport of substrate by extraction of groundwater - Spot of pure product: combining biology and chemical reduction.
Contamination
Treated contaminant(s): Chlorinated Volatile Organic Compounds (CVOC) Contaminant phase: soil/pure product and groundwater Size contamination: 40000 m3 Depth contamination: 20 m below surface
Soil
Soil type: Mainly sand Saturated/unsaturated zone?: Saturated zone Permeability: > 0,1 m/day Flow velocity or gradient groundwater: 20 m/year
Result, duration, expense
Remediation goal: Stable end situatie Load removal Remediation goal achieved?: Remediation in progress Initial and final concentration and load removal: Source CVOC initial concentration: 200000 ug/l; final concentration: 3000 ug/l total load: 900 kg; total final load: <10 kg Contamination 2:plume CVOC initial concentration: 11000 ug/l final concentration: <50 ug/l total initial load: 36 kg; total final load: <1 kg Active remediation phase: 01/06/2008 until 01/09/2008 Passive remediation phase: Expected realization period: 01-09-2008 until 01-09-2018 Total costs passive/after care phase: € 468.800,- Total costs active phase: € 468.800,-
Stakeholders
Problem owner: Arcadis Nederland (Apeldoorn) Contractor: HMVT Remediation plan: Arcadis Remediation research: Arcadis Competent authority: Provincie Gelderland Contact information stake holders:
Additional information
Lessons learned: Remarks:
Related techniques and HIP-pilots